Safety-lock.



C. MONS'I'ROTH.

SAFETY LOCK.

APPLICATION FILED MAY 16, 1914.

l,127,2?', Patented Feb. 2, 1915.

QWU'Z/VVEOL Charms MomsTroTh.

uni NORRIS PETERS Ca. PHoTaLITHOU WASHING/ON. D. t

CHARLES MONSTROTI-I, 0F SKIBO, MINNESOTA:

SAFETY-LOCK.

Specification of Letters Patent.

Patented Feb. 2, 1915.

Application filed May 16, 1914. Serial No. 838,986.

To all whom it may concern:

Be it known that I, GHAnLns MoNsrRo'rH, a citizen of the United States, residing at i ikibo, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Safety-Locks, of which the following is a specification.

My invention relates to improvements in looks and resides in the provision of an eX- tremely simple and reliable device that may be easily and readily positioned between a door and door jamb on the interior of a house and will serve to prevent opening of the door from the outside thus preventing burglars from entering a house in a surreptitious manner.

.Xnother object of importance is to provide a lock of the character described that is simple as to construction, reliable and eilicient in operation and inexpensive to manufacture.

The above and additional objects are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification and then more particularly pointed out as claimed.

With reference to the drawings, wherein l have illustrated the preferred embodiment of my invention as it is reduced to practice, and throughout the several views of which similar reference numerals designate corresponding parts, Figure 1 is a top plan view of my improved safety lock showing the same as it would appear in locked position, and the door and door jamb in section, Fig. 2 is a plan view of my improved lock removed from the door, Fig. 3 is a side elevation, and Fig. 4 is a transverse sectional view, taken on the line 4l of Fig. 8.

Referring to the drawings by characters of reference the numeral 1 designates as an entirety a door and 2 the door jamb. My improved safety lock is designed to be positioned between preferably the longitudinal edge of the door and the jamb as shown in Fig. 1.

My improved safety lock comprises a spring metal locking member designated 3 as an entirety which consists of a single piece of preferably spring steel that is bent back upon itself intermediate its ends to provide a door engaging plate 5 that is spaced from the main portion of the strip a and is approximately half the length of the 3 main strip 4. Formed in the main strip d intermediate the ends thereof are spaced openings 6 to receive locking pins 7 that are rigidly secured to the inner face of the plate 5 intermediate the ends thereof and normally project slightly beyond the outer face of the main strip or body portion 4. Pivoted at 8 at one end to the free end of the body portion 4 is a locking member designated 9 as an entirety that is approximately U-shape in cross section and recessed at its free end to provide shoulders 10 that are designed to engage the free end of the plate The body portion a is reduced as at 11 at its free end and said reduced portion is preferably rolled about a pivot pin that is mounted transversely of the member 9 in ears 12 that are formed in the side portions of the member 9. The main or body portion of the member 9 is provided with an aperture of suflicient size to enable the insertion of the finger to operate the device.

In operation the locking 3 is spaced so that the outer face of the body portion 4 is in engagement with the door jamb 2 and the door is closed so as to force the pins 7 into the jamlo 2 in the position shown by dotted lines in Fig. 1. After this is done the member 9 is swung so that the shoulders 10 engage the outer end of the plate 5 and it will be readily seen that the door is securely locked.

To remove the device it is only necessary to swing the member 9 away from engagement with the end of the plate 5 and the door is free to be opened allowing the member 3 to be withdrawn.

In practice, I have found that the form of my invention, illustrated in the drawings and referred to in the above description, as the preferred embodiment, is the most efiicient and practical; yet realizing that the conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize the fact that various minor changes in details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of my invention, as set forth.

What is claimed is 1. A-safety lock comprising a body plate having a plurality of openings therein, a door engaging plate of spring material integral at one end with one end of the body plate, a plurality of pins rigidly secured to the door engaging plate and extending through the openings inv the body plate, said body plate being spaced from the door en'- gaging plate, said body plate to engage a door jamb and the door engaging plate to engage the edge of a door to force the pins into the door jamb and a locking member pivoted to the outer end of the body plate and designed to engage the door and free end of the door engaging plate, said locking member having shoulders formed at its free end to engage the free end of the door engaging plate and being provided with a finger receiving aperture.

2. A safety lock comprising a body plate having a plurality of openings therein, a door engaging plate of spring material integral at one end With one end of the body plate, a plurality of pins rigidly secured to the door engaging plate and extending through the openings in the body plate, said body plate being spaced from the door engaging plate, said body plate to engage a door jainb and the door engaging plate to engage the edge of a door to force the pins into the door jamb and a locking member pivoted to the outer end of the body plate and designed to engage the door and free end of the door engaging plate, said locking member havingshoulders formed at its free end to engage the free end of the door engaging plate and being provided with a ger receiving aperture, said locking member being approximately U-shaped in cross section.

3. A safety lock comprising a base plate having apertures therein intermediate the ends thereof, a door engaging plate of spring material formed integral With the base plate and being approximately half the length of the base plate and spaced normally therefrom, pins having pointed ends carried by the door engaging plate intermediate the ends thereof and positioned Within the openings. in the base plate, a reduced extension on the free end of the base plate, a Ushaped locking member pivoted to the reduced eX- tension to engage the door, said locking member having shoulders formed at its free end to engage the free end of the door engaging plate and being further provided with a central opening to receive a finger of the hand.

In testimony whereof I afiix my signature in presence of two Witnesses.

CHARLES MONSTROTH.

Witnesses:

WM. H. VAUGHAN, CHAS; EDW. STAHL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

